Madisonville, a town 1.5 miles up Tchefuncta River, has berths at public landings above and below the W side of the bridge.
There are several marinas above the highway bridge. Berths, electricity, gasoline, diesel fuel, water, ice, marine supplies, and launching ramps are available.
Navigation:
The Tchefuncta River flows into Lake Pontchartrain about 21 miles N of New Orleans. Commerce on the river is in shell and steel products. A dredged channel leads from the 10-foot depth in Lake Pontchartrain for about 12.2 miles up Tchefuncta River and its tributary, Bogue Falaya, to the town of Covington, LA. In 2001, the controlling depth was 6 feet across the bar, through the entrance; thence in 1994, 10 feet for about 1.7 miles to Madisonville, thence 4 feet to Abita River, thence 3 feet for about 1.1 miles.
The entrance is marked by a light, a lighted range, and daybeacons. State Route 22 highway bridge crossing the river at Madisonville has a swing span with a clearance of 1 foot. An overhead power cable with a clearance of 85 feet crosses the river about 6 miles above the bridge at Madisonville.
The twin fixed spans of Interstate Route 12 highway bridge with a clearance of 30 feet cross the river about 9.4 miles above the mouth.
